ARS PESTICIDE PROPERTIES last update May 1995


name:DIFLUBENZURON                             CASRN: 35367-38-5

molecular formula: C14H9CLF2N2O2
molecular weight : 310.69
physical state   : S
(L=liquid; G=gas; S=solid)
reference:

_________________________________________________________________________
Key to sources: (M)Manufacturer, (R)eview, (H)andbook, (E)xperiment,
                (C)alculated, (U)nknown, (P)EPA data, (W)auchope

* denotes a selected value where multiple values of a property are listed.
_________________________________________________________________________

-value-            -medium-   -temp-  -pH-   -source-    -reference-


Boiling point(deg C):
       -

Melting point(deg C):
230    -    232                                  H       9ACHB2

Decomposition point(deg C):
       -

Heat of vaporization(deg C):

--RATE CONSTANTS--

Hydrolysis (per day):
0.0046*                          22     5.7      M       7SCHER
0.016*                           22     9        M       7SCHER

Photolysis (per day):
0.1 OD*              WATER                       M       7SCHER

Vapor pressure (mPa):
 <.03                            50              H       9ACHB2
 1.2E-04*                        25              M       7SCHER


Water solubility (ppm):        -temp-       -source-     -reference-
0.08*                            25              M       7SCHER
                                                 C       8GLEAM

Organic solubility (ppm):
6.5E+3*    ACETONE             20-25             M       7SCHER
2E+3*      ACETONITRILE        20-25             M       7SCHER
2.4E+4*    DIOXANE             20-25             M       7SCHER
1.04E+5*   DIMETHYFORMAMIDE    20-25             M       7SCHER
1.2E+5*    DIMETHYLSULFOXIDE   20-25             M       7SCHER
1E+3*      METHANOL            20-25             M       7SCHER
6E+2*      DICHLOFOMETHANE     20-25             M       7SCHER

Henrys law (Pa m3/mol):
4.7E-04*                          25             M       7SCHER

Octanol/water partitioning (log Kow):
3.89*                                            M       7SCHER

Acid dissociation (pKa):


Soil sorption:
soiltype        temp.   Kd      Koc      %om     pH     reference
                                6790                    EESADV
                                                        8GLEAM
                                10600                   EESADV
                                8700*

Field Dissipation halflife(days):
value           test area        pH          source     reference
3-4                                             H       9FACHB
9                                               C       8GLEAM
<2-7                                            P       8EPAGR
2-6                                             M       7SCHER
7-35                                            M       7SCHER
8(2-35)*

Halflife in soil:
Soiltype             aerobic      anaerobic   source    reference
VARIOUS TYPES          4          4             M       7SCHER


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